---
_id: '12071'
abstract:
- lang: eng
  text: Despite many efforts to rationalize the strongly correlated electronic ground
    states in doped Mott insulators, the nature of the doping-induced insulator-to-metal
    transition is still a subject under intensive investigation. Here, we probe the
    nanoscale electronic structure of the Mott insulator Sr₂IrO₄δ with low-temperature
    scanning tunneling microscopy and find an enhanced local density of states (LDOS)
    inside the Mott gap at the location of individual defects which we interpret as
    defects at apical oxygen sites. A chiral behavior in the topography for those
    defects has been observed. We also visualize the local enhanced conductance arising
    from the overlapping of defect states which induces finite LDOS inside of the
    Mott gap. By combining these findings with the typical spatial extension of isolated
    defects of about 2 nm, our results indicate that the insulator-to-metal transition
    in Sr₂IrO₄−δ could be percolative in nature.
article_number: '023075'
article_processing_charge: No
article_type: original
author:
- first_name: Zhixiang
  full_name: Sun, Zhixiang
  last_name: Sun
- first_name: Jose M.
  full_name: Guevara, Jose M.
  last_name: Guevara
- first_name: Steffen
  full_name: Sykora, Steffen
  last_name: Sykora
- first_name: Ekaterina
  full_name: Paerschke, Ekaterina
  id: 8275014E-6063-11E9-9B7F-6338E6697425
  last_name: Paerschke
  orcid: 0000-0003-0853-8182
- first_name: Kaustuv
  full_name: Manna, Kaustuv
  last_name: Manna
- first_name: Andrey
  full_name: Maljuk, Andrey
  last_name: Maljuk
- first_name: Sabine
  full_name: Wurmehl, Sabine
  last_name: Wurmehl
- first_name: Jeroen
  full_name: van den Brink, Jeroen
  last_name: van den Brink
- first_name: Bernd
  full_name: Büchner, Bernd
  last_name: Büchner
- first_name: Christian
  full_name: Hess, Christian
  last_name: Hess
citation:
  ama: Sun Z, Guevara JM, Sykora S, et al. Evidence for a percolative Mott insulator-metal
    transition in doped Sr₂IrO₄. <i>Physical Review Research</i>. 2021;3(2). doi:<a
    href="https://doi.org/10.1103/physrevresearch.3.023075">10.1103/physrevresearch.3.023075</a>
  apa: Sun, Z., Guevara, J. M., Sykora, S., Paerschke, E., Manna, K., Maljuk, A.,
    … Hess, C. (2021). Evidence for a percolative Mott insulator-metal transition
    in doped Sr₂IrO₄. <i>Physical Review Research</i>. American Physical Society.
    <a href="https://doi.org/10.1103/physrevresearch.3.023075">https://doi.org/10.1103/physrevresearch.3.023075</a>
  chicago: Sun, Zhixiang, Jose M. Guevara, Steffen Sykora, Ekaterina Paerschke, Kaustuv
    Manna, Andrey Maljuk, Sabine Wurmehl, Jeroen van den Brink, Bernd Büchner, and
    Christian Hess. “Evidence for a Percolative Mott Insulator-Metal Transition in
    Doped Sr₂IrO₄.” <i>Physical Review Research</i>. American Physical Society, 2021.
    <a href="https://doi.org/10.1103/physrevresearch.3.023075">https://doi.org/10.1103/physrevresearch.3.023075</a>.
  ieee: Z. Sun <i>et al.</i>, “Evidence for a percolative Mott insulator-metal transition
    in doped Sr₂IrO₄,” <i>Physical Review Research</i>, vol. 3, no. 2. American Physical
    Society, 2021.
  ista: Sun Z, Guevara JM, Sykora S, Paerschke E, Manna K, Maljuk A, Wurmehl S, van
    den Brink J, Büchner B, Hess C. 2021. Evidence for a percolative Mott insulator-metal
    transition in doped Sr₂IrO₄. Physical Review Research. 3(2), 023075.
  mla: Sun, Zhixiang, et al. “Evidence for a Percolative Mott Insulator-Metal Transition
    in Doped Sr₂IrO₄.” <i>Physical Review Research</i>, vol. 3, no. 2, 023075, American
    Physical Society, 2021, doi:<a href="https://doi.org/10.1103/physrevresearch.3.023075">10.1103/physrevresearch.3.023075</a>.
  short: Z. Sun, J.M. Guevara, S. Sykora, E. Paerschke, K. Manna, A. Maljuk, S. Wurmehl,
    J. van den Brink, B. Büchner, C. Hess, Physical Review Research 3 (2021).
date_created: 2022-09-08T15:01:16Z
date_published: 2021-04-27T00:00:00Z
date_updated: 2022-09-09T07:26:01Z
day: '27'
ddc:
- '530'
doi: 10.1103/physrevresearch.3.023075
extern: '1'
file:
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  date_created: 2022-09-09T07:23:40Z
  date_updated: 2022-09-09T07:23:40Z
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file_date_updated: 2022-09-09T07:23:40Z
fulldoi: https://doi.org/10.1103/physrevresearch.3.023075
has_accepted_license: '1'
intvolume: '         3'
issue: '2'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
publication: Physical Review Research
publication_identifier:
  issn:
  - 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Evidence for a percolative Mott insulator-metal transition in doped Sr₂IrO₄
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 3
year: '2021'
...